High-wear-resistance lubricating oil composition and preparation method thereof

Abstract

The invention relates to a high-wear-resistance lubricating oil composition and a preparation method thereof, and belongs to the technical field of lubricating oil. The lubricating oil composition is prepared from the following components in parts by weight: 100 parts of base oil, 1.7 to 2.3 parts of wear-resistant additive, 1.25 to 1.4 parts of clearing agent, 1.8 to 2.1 parts of dispersing agent, 0.35 to 0.45 part of antioxidant, 0.14 to 0.18 part of antirust agent and 3.7 to 4.2 parts of viscosity index improver, according to the wear-resistant additive, triallylamine and 1-thioglycerol are subjected to addition to prepare an intermediate with a multi-branch hydroxyl structure, then ethylene chlorophosphite reacts with hydroxyl grafted on an intermediate molecule to form a phosphate compound, namely a modified matrix, and then the wear-resistant additive is prepared in a liquid-phase environment. Molybdenum disulfide is deposited on modified matrix molecules in situ through chelation, an organic-inorganic aggregate is formed and has good compatibility with a traditional lubricating oil system, and the wear resistance of the lubricating oil under the heavy-load impact working condition is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricating oils, and in particular, relates to a high wear-resistant lubricating oil composition and a preparation method thereof. Background Art

[0002] Friction and wear are the main causes of primary energy loss and mechanical equipment failure. Reasonable use of lubrication technology can effectively reduce friction and wear. Generally, lubricating media are filled between parts with relative motion. Lubricating oil is an important component of lubricating media. It is generally composed of base oil and additives. Base oil is the main component of lubricating oil and determines the basic properties of lubricating oil. Additives can make up for and improve the deficiencies in the performance of base oil and give it certain new properties. It is an important component of lubricating oil.

[0003] Traditional lubricants can achieve good steady-state wear resistance through the formulation of additives. However, with the rapid development of high-end equipment manufacturing industry, the working conditions of lubricants are becoming more and more complicated. For example, under harsh working conditions such as heavy load and impact, traditional oil film lubrication is insufficient, resulting in serious wear of mechanical equipment and greatly reducing the life of the equipment. Summary of the invention

[0004] In order to solve the technical problems mentioned in the background technology, the object of the present invention is to provide a high wear-resistant lubricating oil composition and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A highly wear-resistant lubricating oil composition comprises the following components in parts by weight: 100 parts of base oil, 1.7-2.3 parts of anti-wear additive, 1.25-1.4 parts of detergent, 1.8-2.1 parts of dispersant, 0.35-0.45 parts of antioxidant, 0.14-0.18 parts of rust inhibitor and 3.7-4.2 parts of viscosity index improver; Furthermore, the base oil is a paraffin base oil, preferably a 400SN type product.

[0006] Furthermore, the detergent is a sulfonate detergent, preferably a T101 product.

[0007] Furthermore, the dispersant is a boronated succinimide dispersant, preferably a T154B product.

[0008] Furthermore, the antioxidant is a hindered phenol antioxidant, preferably a WX8135 product.

[0009] Furthermore, the rust inhibitor is an organic acid rust inhibitor, preferably a T746 product.

[0010] Furthermore, the viscosity index improver is an ethylene-propylene copolymer viscosity index improver, preferably a T614 product.

[0011] The preparation method of the wear-resistant additive comprises the following steps: Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 45-55°C, apply 60-90 rpm stirring and 120-180 W / m 2 UV irradiation, intermittent addition of dimethyl azobisisobutyrate for 4-5 hours, after the reaction is completed, acetone is removed by rotary evaporation to obtain an intermediate; Furthermore, the dosage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone is 10mmol:32-34mmol:12-18mg:15-20mL, and under the initiation of dimethyl azobisisobutyrate and the promotion of ultraviolet irradiation, 1-thioglycerol and triallylamine are added to form a multi-branched hydroxyl compound.

[0012] Step A2: The intermediate, ethylene chlorophosphite, triethylamine and dioxane are mixed, nitrogen is introduced for protection, the temperature is raised to 80-90° C., and the reaction is stirred at 120-150 rpm for 2.5-3.5 hours. After the reaction is completed, the dioxane is removed by vacuum rotary evaporation to obtain a modified matrix; Furthermore, the usage ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10mmol:35-40mmol:5-8mL:40-55mL, and the ethylene chlorophosphite reacts with the hydroxyl group grafted on the intermediate molecule to form a phosphate compound.

[0013] Step A3: premix the modified substrate, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea and mix well, heat to 60-70°C, stir at 180-240 rpm for 1-1.5 hours, then pressurize with nitrogen to 4.5-5.5 bar, heat to 190-210°C and continue to react for 6-8 hours. After the reaction is completed, take the precipitate, wash it with ethanol and vacuum dry it to obtain a wear-resistant additive; Furthermore, the dosage ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:32-36mmol:0.16-0.22g:0.6-0.75g:60-75mL, the volume fraction of dimethylacetamide solution is 60%, and in a liquid environment, the sulfur and nitrogen elements of the modified matrix and the phosphate organic structure form a complex, and ammonium molybdate is preferentially enriched on the molecules of the modified matrix. Then, under high temperature and high pressure, ammonium molybdate reacts with thiourea under the promotion of manganese chloride to form aggregated particles of molybdenum disulfide and the modified matrix.

[0014] A method for preparing a highly wear-resistant lubricating oil composition comprises the following steps: heating a base oil to 60°C, adding a wear-resistant additive, a detergent, a dispersant, an antioxidant and a rust inhibitor, mixing the mixture, cooling the mixture to room temperature, adding a viscosity index improver and mixing the mixture to obtain a highly wear-resistant lubricating oil composition.

[0015] Beneficial effects of the present invention: The invention discloses an organic-inorganic wear-resistant additive, which has good compatibility with a traditional lubricating oil system and significantly improves the wear resistance of the lubricating oil under heavy-load impact conditions. The additive is prepared by adding triallylamine to 1-thioglycerol to form an intermediate with a multi-branched hydroxyl structure, and then ethylene chlorophosphite reacts with the hydroxyl grafted on the intermediate molecule to form a phosphate compound, which is a modified matrix. A large number of ring structures at the ends of the modified matrix molecules make the molecules tend to be spherical structures under steric hindrance, and the sulfur and nitrogen elements in the molecules form a complex with the phosphate structure. Ammonium molybdate is enriched by complexation in a liquid phase environment. Under high temperature and high pressure conditions, the modified matrix is ​​used as a template, and molybdenum disulfide formed by the reaction of ammonium molybdate enriched on the surface with thiourea is in-situ deposited on the modified matrix. On the molecules, aggregated particles of molybdenum disulfide and modified matrix are formed, which are wear-resistant additives; under conventional friction conditions, the structure of the wear-resistant additive is stable, forming ball friction. Under heavy-load impact conditions, the aggregate structure of the wear-resistant additive collapses to form buffer lubrication, and the released modified matrix adheres to the molybdenum disulfide micro-nano particles and fills the friction interface to form a composite lubricating film. The dual lubrication effect effectively reduces the friction and wear under heavy-load impact; the organic structure of the wear-resistant additive contains a large amount of alkyl phosphate structure, which has good compatibility with traditional base oils, and the aggregate structure of the wear-resistant additive itself has a low specific gravity, and the composite organic modified matrix further reduces the specific gravity, so that the wear-resistant additive has good dispersion stability in the composition, which is conducive to exerting a stable wear-resistant lubrication effect. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1, preparation of a high wear-resistant lubricating oil composition, the specific implementation process is as follows: (1) Preparation of wear-resistant additives Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 55°C, apply 90 rpm stirring and 180 W / m 2Under ultraviolet irradiation, equal amounts of dimethyl azobisisobutyrate were added three times with an interval of 15 min. After complete addition, the reaction was continued, and the reaction time of dimethyl azobisisobutyrate was controlled to be 4 h. The dosage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone was 10 mmol: 34 mmol: 18 mg: 20 mL. After the reaction was completed, acetone was removed by rotary evaporation to obtain an intermediate.

[0018] Step A2: Take the intermediate, ethylene chlorophosphite, triethylamine and dioxane, mix them, introduce nitrogen protection, heat to 90°C, and stir at 150rpm to react for 2.5h, wherein the amount ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10mmol:40mmol:8mL:55mL. After the reaction is completed, the dioxane is removed by reduced pressure rotary evaporation to obtain a modified matrix.

[0019] Step A3: pre-mix the modified matrix, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea to mix, heat to 70°C, stir at 240rpm for 1h, then pressurize with nitrogen to 5.5bar, heat to 210°C and continue to react for 6h, wherein the amount ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:36mmol:0.22g:0.75g:75mL, and the dimethylacetamide solution is a 60% volume fraction aqueous solution. After the reaction, take the precipitate, wash it with ethanol and vacuum dry it to obtain a wear-resistant additive.

[0020] (2) Preparation of high wear-resistant lubricating oil composition Ingredients: The raw materials are taken according to weight parts, 100 parts of base oil, paraffin base oil 400SN type product is used in the implementation process, provided by Wuxi Yongzhen Industrial Oil Products Co., Ltd.; 1.7 parts of wear-resistant additives are homemade in this embodiment; 1.35 parts of detergent, sulfonate detergent T101 type product is used in the implementation process, 1.8 parts of dispersant, boronated succinimide dispersant T154B type product is used in the implementation process, 0.4 parts of antioxidant, hindered phenol antioxidant WX8135 type product is used in the implementation process, 0.18 parts of rust inhibitor, organic acid rust inhibitor T746 type product is used in the implementation process, all provided by Wuxi Nanfang Petroleum Additives Co., Ltd.; 3.7 parts of viscosity index improver, ethylene-propylene copolymer viscosity index improver T614 type product is used in the implementation process, provided by Beijing Tianyi Yongchang Chemical Technology Co., Ltd.

[0021] Blending: Heat the base oil to 60°C, add anti-wear additives, detergents, dispersants, antioxidants and rust inhibitors, stir at 240 rpm for 25 min, cool to room temperature, add viscosity index improver, stir at 60 rpm for 1 h to obtain a high wear-resistant lubricating oil composition.

[0022] Example 2, preparing a high wear-resistant lubricating oil composition, the specific implementation process is as follows: (1) Preparation of wear-resistant additives Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 50°C, stir at 60 rpm and apply 150 W / m 2 Under ultraviolet irradiation, equal amounts of dimethyl azobisisobutyrate were added three times with an interval of 20 min. After complete addition, the reaction was continued, and the reaction time of dimethyl azobisisobutyrate was controlled to be 4.5 h. The dosage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone was 10 mmol: 33 mmol: 16 mg: 18 mL. After the reaction was completed, acetone was removed by rotary evaporation to obtain an intermediate.

[0023] Step A2: Take the intermediate, ethylene chlorophosphite, triethylamine and dioxane, mix them, introduce nitrogen protection, heat to 80°C, and stir at 120rpm to react for 3 hours, wherein the amount ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10mmol:38mmol:7mL:50mL. After the reaction is completed, the dioxane is removed by reduced pressure rotary evaporation to obtain a modified matrix.

[0024] Step A3: pre-mix the modified matrix, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea to mix, heat to 65°C, stir at 240rpm for 1.3h, then pressurize with nitrogen to 5bar, heat to 200°C and continue to react for 6.5h, wherein the amount ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:35mmol:0.18g:0.65g:70mL, and the dimethylacetamide solution is a 60% volume fraction aqueous solution. After the reaction, take the precipitate, wash it with ethanol and vacuum dry it to obtain a wear-resistant additive.

[0025] (2) Preparation of high wear-resistant lubricating oil composition Ingredients: The raw materials are taken according to weight parts, 100 parts of base oil, paraffin base oil 400SN type product is used in the implementation process, provided by Wuxi Yongzhen Industrial Oil Products Co., Ltd.; 2.3 parts of wear-resistant additives are homemade in this embodiment; 1.25 parts of detergent, sulfonate detergent T101 type product is used in the implementation process, 2.1 parts of dispersant, boronated succinimide dispersant T154B type product is used in the implementation process, 0.35 parts of antioxidant, hindered phenol antioxidant WX8135 type product is used in the implementation process, 0.15 parts of rust inhibitor, organic acid rust inhibitor T746 type product is used in the implementation process, all provided by Wuxi Southern Petroleum Additives Co., Ltd.; 4.2 parts of viscosity index improver, ethylene-propylene copolymer viscosity index improver T614 type product is used in the implementation process, provided by Beijing Tianyi Yongchang Chemical Technology Co., Ltd.

[0026] Blending: Heat the base oil to 60°C, add anti-wear additives, detergents, dispersants, antioxidants and rust inhibitors, stir at 240 rpm for 35 min, cool to room temperature, add viscosity index improver, stir at 60 rpm for 1 h to obtain a high wear-resistant lubricating oil composition.

[0027] Example 3, preparing a high wear-resistant lubricating oil composition, the specific implementation process is as follows: (1) Preparation of wear-resistant additives Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 45°C, apply 60 rpm stirring and 120 W / m 2 Under ultraviolet irradiation, equal amounts of dimethyl azobisisobutyrate were added in three times with an interval of 30 min. After complete addition, the reaction was continued, and the reaction time of dimethyl azobisisobutyrate was controlled to be 5 h. The dosage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone was 10 mmol: 32 mmol: 12 mg: 15 mL. After the reaction was completed, acetone was removed by rotary evaporation to obtain an intermediate.

[0028] Step A2: Take the intermediate, ethylene chlorophosphite, triethylamine and dioxane, mix them, introduce nitrogen protection, heat to 80°C, and stir at 120rpm to react for 3.5h, wherein the amount ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10mmol:35mmol:5mL:40mL. After the reaction, the dioxane is removed by reduced pressure rotary evaporation to obtain a modified matrix.

[0029] Step A3: pre-mix the modified matrix, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea to mix, heat to 60°C, stir at 180rpm for 1.5h, then pressurize with nitrogen to 4.5bar, heat to 190°C and continue to react for 8h, wherein the amount ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:32mmol:0.16g:0.6g:60mL, and the dimethylacetamide solution is a 60% volume fraction aqueous solution. After the reaction is completed, the precipitate is washed with ethanol and vacuum dried to obtain a wear-resistant additive.

[0030] (2) Preparation of high wear-resistant lubricating oil composition Ingredients: The raw materials are taken according to weight parts, 100 parts of base oil, paraffin base oil 400SN type product is used in the implementation process, provided by Wuxi Yongzhen Industrial Oil Products Co., Ltd.; 1.9 parts of wear-resistant additives are homemade in this embodiment; 1.4 parts of detergent, sulfonate detergent T101 type product is used in the implementation process, 1.9 parts of dispersant, boronated succinimide dispersant T154B type product is used in the implementation process, 0.42 parts of antioxidant, hindered phenol antioxidant WX8135 type product is used in the implementation process, 0.14 parts of rust inhibitor, organic acid rust inhibitor T746 type product is used in the implementation process, all provided by Wuxi Nanfang Petroleum Additives Co., Ltd.; 4 parts of viscosity index improver, ethylene-propylene copolymer viscosity index improver T614 type product is used in the implementation process, provided by Beijing Tianyi Yongchang Chemical Technology Co., Ltd.

[0031] Blending: Heat the base oil to 60°C, add anti-wear additives, detergents, dispersants, antioxidants and rust inhibitors, stir at 240 rpm for 30 min, cool to room temperature, add viscosity index improver, stir at 60 rpm for 1.2 h to obtain a high wear-resistant lubricating oil composition.

[0032] Example 4, preparing a high wear-resistant lubricating oil composition, the specific implementation process is as follows: (1) Preparation of wear-resistant additives Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 55°C, apply 90 rpm stirring and 160 W / m 2 Under ultraviolet irradiation, equal amounts of dimethyl azobisisobutyrate were added in three times with an interval of 25 min. After complete addition, the reaction was continued, and the reaction time of dimethyl azobisisobutyrate was controlled to be 4.2 h. The dosage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone was 10 mmol: 32 mmol: 17 mg: 20 mL. After the reaction was completed, acetone was removed by rotary evaporation to obtain an intermediate.

[0033] Step A2: Take the intermediate, ethylene chlorophosphite, triethylamine and dioxane, mix them, introduce nitrogen protection, heat to 90°C, and stir at 150rpm to react for 3.2h, wherein the amount ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10mmol:40mmol:6mL:50mL. After the reaction is completed, the dioxane is removed by reduced pressure rotary evaporation to obtain a modified matrix.

[0034] Step A3: pre-mix the modified matrix, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea to mix, heat to 60°C, stir at 240rpm for 1.5h, then pressurize with nitrogen to 5.5bar, heat to 200°C and continue to react for 7.5h, wherein the amount ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:34mmol:0.2g:0.7g:70mL, and the dimethylacetamide solution is a 60% volume fraction aqueous solution. After the reaction is completed, the precipitate is washed with ethanol and vacuum dried to obtain a wear-resistant additive.

[0035] (2) Preparation of high wear-resistant lubricating oil composition Ingredients: The raw materials are taken according to weight parts, 100 parts of base oil, paraffin base oil 400SN type product is used in the implementation process, provided by Wuxi Yongzhen Industrial Oil Products Co., Ltd.; 2 parts of wear-resistant additives are homemade in this embodiment; 1.3 parts of detergent, sulfonate detergent T101 type product is used in the implementation process, 2 parts of dispersant, boronated succinimide dispersant T154B type product is used in the implementation process, 0.45 parts of antioxidant, hindered phenol antioxidant WX8135 type product is used in the implementation process, 0.15 parts of rust inhibitor, organic acid rust inhibitor T746 type product is used in the implementation process, all provided by Wuxi Southern Petroleum Additives Co., Ltd.; 3.9 parts of viscosity index improver, ethylene-propylene copolymer viscosity index improver T614 type product is used in the implementation process, provided by Beijing Tianyi Yongchang Chemical Technology Co., Ltd.

[0036] Blending: Heat the base oil to 60°C, add anti-wear additives, detergents, dispersants, antioxidants and rust inhibitors, stir at 240 rpm for 35 min, cool to room temperature, add viscosity index improver, stir at 60 rpm for 1.3 h to obtain a highly wear-resistant lubricating oil composition.

[0037] Comparative Example This comparative example refers to Example 4, without adding wear-resistant additives, and adding 0.7 parts of anti-wear agent T309, industrial-grade raw materials, 1.5 parts of molybdenum disulfide powder, model XF184-1, provided by Jiangsu Xianfeng Nanomaterial Technology Co., Ltd., and the rest of the implementation process is exactly the same.

[0038] Samples were taken from the lubricating oil compositions prepared as above and tested as follows: Stability test: The sample was placed at 50°C for 7 days, and the transmittance of the sample before and after the placement was measured by spectrophotometry. The transmittance change rate ΔT was calculated to characterize the stability of the lubricating oil composition. Wear resistance test: Use a four-ball testing machine to measure the maximum no-seizure load P of the sample. B , sintering load P D, Wear spot diameter WSD test, load is 294N, speed is 450r / min, test time is 60min; Impact wear resistance test: The impact wear test was carried out using a ring-block friction and wear tester, with a constant load of 600N, a speed of 300r / min, an impact load of 100N, an impact start and stop time of 1s, an intermittent time of 10s, a cycle of 1h, and an average friction coefficient μ after impact wear. The specific test results are shown in Table 1:

[0039] It can be seen from the test results in Table 1 that the lubricating oil composition of the embodiment has excellent stability and good anti-wear lubrication effect, and exhibits excellent wear resistance especially under heavy load impact conditions.

[0040] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A highly wear-resistant lubricating oil composition, characterized in that: The composition includes the following components by weight: 100 parts of base oil, 1.7-2.3 parts of anti-wear additive, 1.25-1.4 parts of detergent, 1.8-2.1 parts of dispersant, 0.35-0.45 parts of antioxidant, 0.14-0.18 parts of rust inhibitor and 3.7-4.2 parts of viscosity index improver; The preparation method of the wear-resistant additive comprises the following steps: Step A1: Mix triallylamine, 1-thioglycerol and acetone, raise the temperature to 45-55°C, and apply 120-180W / m 2 Irradiate with ultraviolet light, stir and add dimethyl azobisisobutyrate intermittently to react for 4-5 hours. After the reaction is completed, remove acetone by rotary evaporation to obtain an intermediate; Step A2: The intermediate, ethylene chlorophosphite, triethylamine and dioxane are mixed, nitrogen is introduced for protection, the temperature is raised to 80-90° C., and the mixture is stirred for reaction for 2.5-3.5 hours. After the reaction is completed, the dioxane is removed by vacuum rotary evaporation to obtain a modified matrix; Step A3: premix the modified substrate, ammonium molybdate and dimethylacetamide solution, then add manganese chloride and thiourea and mix well, heat to 60-70°C and stir for 1-1.5h, then pressurize with nitrogen to 4.5-5.5bar, heat to 190-210°C and continue to react for 6-8h. After the reaction is completed, take the precipitate, wash it with ethanol and vacuum dry it to obtain a wear-resistant additive.

2. A highly wear-resistant lubricating oil composition according to claim 1, characterized in that: The usage ratio of triallylamine, 1-thioglycerol, dimethyl azobisisobutyrate and acetone is 10 mmol: 32-34 mmol: 12-18 mg: 15-20 mL.

3. A highly wear-resistant lubricating oil composition according to claim 2, characterized in that: The usage ratio of the intermediate, ethylene chlorophosphite, triethylamine and dioxane is 10 mmol: 35-40 mmol: 5-8 mL: 40-55 mL.

4. A highly wear-resistant lubricating oil composition according to claim 3, characterized in that: The dosage ratio of ammonium molybdate, thiourea, manganese chloride, modified matrix and dimethylacetamide solution is 10mmol:32-36mmol:0.16-0.22g:0.6-0.75g:60-75mL, and the volume fraction of dimethylacetamide solution is 60%.

5. A highly wear-resistant lubricating oil composition according to claim 1, characterized in that: The base oil is paraffin-based.

6. A highly wear-resistant lubricating oil composition according to claim 1, characterized in that: The dispersant is a boronated succinimide dispersant.

7. A highly wear-resistant lubricating oil composition according to claim 1, characterized in that: The viscosity index improver is an ethylene-propylene copolymer viscosity index improver.

8. The method for preparing a highly wear-resistant lubricating oil composition according to any one of claims 1 to 7, characterized in that: The specific method is: heating the base oil to 60°C, adding wear-resistant additives, detergents, dispersants, antioxidants and rust inhibitors, mixing, cooling to room temperature, adding viscosity index improver and mixing, to obtain a high wear-resistant lubricating oil composition.

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